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Jepsonia heterandra

Eastw.

Foothill Jepsonia

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.155751
Element CodePDSAX0J010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilySaxifragaceae
GenusJepsonia
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank Method Rank calculation - Excel v3.2x
Review Date2024-09-06
Change Date2024-09-11
Edition Date2018-01-23
Edition AuthorsBittman (2018), rev. N. Ventrella (2024)
Threat ImpactLow
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Jepsonia heterandra is a perennial herb occurring in crevices and dry, rocky slopes of cismontane woodlands and lower montane coniferous forests of the northern and central Sierra Nevada region of California. There are 21 to 80 occurrences of this species, many of which occur on National Forest lands, where anthropogenic threats are considered low. This species is narrowly restricted in habitat to the crevices of slate-like rocks.
Range Extent Comments
Jepsonia heterandra is endemic to the northern and central Sierra Nevada region in Amador, Calaveras, El Dorado, Mariposa, Stanislaus, and Tuolumne counties of California in the western United States (CNPS 2024). Range extent was estimated to be 4,845 square kilometers, excluding the 1958 herbarium record from Tulare county (W.E. Simonds 2124 (CDA) (GBIF 2024).
Occurrences Comments
The number of occurrences was estimated to be 21 to 80.
Threat Impact Comments
Jepsonia heterandra is ranked as "not very threatened in California" (CNPS 2024). This ranking means that less than 20% of occurrences are considered threatened, or that there is a low degree and immediacy of threats, or that current threats to the species are unknown. Many populations occur on protected National Forest lands, where anthropogenic threats are presumed to be low (Calflora 2024).
Ecology & Habitat

Habitat

Jepsonia heterandra occurs in crevices, especially in slate-like outcrops, and on dry, rocky slopes of cismontane woodlands and lower montane coniferous forests (FNA 2009, Jepson Flora Project 2024).
Terrestrial Habitats
Forest/WoodlandForest - ConiferBare rock/talus/scree
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationPERENNIAL, Short-lived
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Ferguson RidgeSierra National Forest6,104
References (9)
  1. CalFlora. 2024. Information on California plants for education, research and conservation. Berkeley, California: The CalFlora Database [web application]. Available: http://www.calflora.org/. (Accessed 2024).
  2. California Native Plant Society (CNPS), Rare Plant Program. 2024. Inventory of Rare and Endangered Plants of California, online edition, v9.5. Online. Available: https://www.rareplants.cnps.org (accessed 2024).
  3. Flora of North America Editorial Committee (FNA). 2009. Flora of North America north of Mexico. Vol. 8. Magnoliophyta: Paeoniaceae to Ericaceae. Oxford University Press, New York. xxiv + 585 pp.
  4. Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  5. Jepson Flora Project (eds.) 2024. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2024).
  6. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
  7. Munz, P.A., with D.D. Keck. 1959. A California flora. Univ. California Press, Berkeley. 1681 pp.
  8. Ornduff, R. 1969. Ecology, morphology, and systematics of Jepsonia (Saxifragaceae). Brittonia 21:286-298.
  9. Ornduff, R. 1971. The reproductive system of <i>Jepsonia heterandra</i>. Evolution 1: 300-311.